Blender with system python failing
All right... I had the same error appearing today and I have been able to solve it. It's been pretty easy. After removing blender and installing blender from ppa:thomas-schiex/blender There were some files still around.
To make sure everything works try:

sudo apt-get purge blender
cd /usr/lib
sudo rm -r blender
sudo add-apt-repository ppa:thomas-schiex/blender
sudo apt-get update
sudo apt-get install blender


Since everything is purged AND manually removed from versions installed manually it should be fine now. Have fun  :)